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What is an example of environmental factors that cause mutations in DNA?
Environmental factors that can cause mutations in DNA include exposure to radiation, such as ultraviolet (UV) light and ionizing radiation, which can damage the DNA structure. Additionally, chemical agents like certain pesticides, heavy metals, and industrial pollutants can lead to alterations in the DNA sequence. These environmental mutagens can result in changes that may contribute to diseases, including cancer.
Meselson and Stahl used what type of isotopes to determine mechanism by which DNA replicated?
Meselson and Stahl used heavy isotopes of nitrogen (N^15 and N^14) to track the replication of DNA in E. coli bacteria. By switching from N^15 to N^14, they were able to demonstrate the semi-conservative mechanism of DNA replication.
In a gel electrophoresis's why are the lines closer together when the DNA strands are heavier?
Heavier DNA strands move slower through the gel due to their larger size and mass, causing them to travel shorter distances during the same amount of time compared to lighter DNA strands. This results in the heavier DNA bands being closer together on the gel, as they have not traveled as far as the lighter bands in the same time frame.
What is CsCl profile of a DNA and why CsCl is used for ultracentrifugation?
Since CsCl is a kind of heavy salt, it forms density gradients when centrifugation. When sedimentation equilibrium, DNA moves to the position where meets its density. The density of DNA is related to its GC%, by analytical ultracentrifugation, we can read the GC levels of the DNA from its position in the solution. Please refer to the article for detail: Using analytical ultracentrifugation to study compositional variation in vertebrate genomes (Euro Biophys J. 2003 32: pp418-426)
How did meselson and stahl produce bacterial cells containing only DNA made with nitrogen 15?
Meselson and Stahl used a technique called density gradient centrifugation to produce bacterial cells containing only nitrogen-15 (N-15) DNA. They grew E. coli bacteria in a medium containing N-15, allowing the bacteria to incorporate this heavy isotope into their DNA. After several generations, they then switched the bacteria to a medium with regular nitrogen (N-14) and allowed them to replicate. By centrifuging the DNA, they could separate and analyze the densities of the DNA strands, confirming the semi-conservative nature of DNA replication.
Meselson and Stahl used what type of isotopes to determine mechanism by which DNA replicated?
Meselson and Stahl used heavy isotopes of nitrogen (N^15 and N^14) to track the replication of DNA in E. coli bacteria. By switching from N^15 to N^14, they were able to demonstrate the semi-conservative mechanism of DNA replication.
In a gel electrophoresis's why are the lines closer together when the DNA strands are heavier?
Heavier DNA strands move slower through the gel due to their larger size and mass, causing them to travel shorter distances during the same amount of time compared to lighter DNA strands. This results in the heavier DNA bands being closer together on the gel, as they have not traveled as far as the lighter bands in the same time frame.
How is DNA tested and why?
by DNA fingerprinting method , DNA-DNA hybirdization or DNA sequencing. to know the sequence of DNA
What is CsCl profile of a DNA and why CsCl is used for ultracentrifugation?
Since CsCl is a kind of heavy salt, it forms density gradients when centrifugation. When sedimentation equilibrium, DNA moves to the position where meets its density. The density of DNA is related to its GC%, by analytical ultracentrifugation, we can read the GC levels of the DNA from its position in the solution. Please refer to the article for detail: Using analytical ultracentrifugation to study compositional variation in vertebrate genomes (Euro Biophys J. 2003 32: pp418-426)
How did meselson and stahl produce bacterial cells containing only DNA made with nitrogen 15?
Meselson and Stahl used a technique called density gradient centrifugation to produce bacterial cells containing only nitrogen-15 (N-15) DNA. They grew E. coli bacteria in a medium containing N-15, allowing the bacteria to incorporate this heavy isotope into their DNA. After several generations, they then switched the bacteria to a medium with regular nitrogen (N-14) and allowed them to replicate. By centrifuging the DNA, they could separate and analyze the densities of the DNA strands, confirming the semi-conservative nature of DNA replication.
What are the four enzymes involved in DNA replication and repair?
The four enzymes involved in DNA replication and repair are DNA polymerase, DNA helicase, DNA ligase, and DNA primase. DNA polymerase synthesizes new DNA strands, DNA helicase unwinds the double helix, DNA ligase joins the Okazaki fragments on the lagging strand, and DNA primase synthesizes RNA primers for DNA polymerase to begin replication.
How would the DNA of the human compare to the DNA of the duck?
DNA is DNA it can not be changed.
What is the function of DNA helicare in DNA replication?
DNA Helicase unwinds and unzips the DNA. It separates the two strands of DNA so DNA replication can occur.
What is a synonym for DNA replication?
IT can be called * DNA duplication * DNA reproduction * DNA imitation
What are 5 harmful metals and why?
Two are Lead and Mercury these can cause nerve and brain damage and are classified as heavy metal poisons. Chromium, and especially some of its compounds can cause cancer. Copper, if ingested, can form oxidizing agents that damage lipids, proteins, and DNA. Uranium is both a heavy metal poison and is radioactive.
The cells hereditary material?
DNA
How does the DNA helix relate to DNA?
It is how the DNA is constructed.
